So if you get this problem, here is how I fixed it:
I moved directory ~/Documents/Enpass to ~/Documents/Enpass2
then I reinstalled version 6.0.7 and opened it. Reinstalling it recreates the ~/Documents/Enpass folder.
It opens a fresh instance of Enpass with no user
From there you can import from a backup. Your backups are in ~/Documents/Enpass2/Backups
select the last backup file , it will ask for your original password